精细与专用化学品
精細與專用化學品
정세여전용화학품
FINE AND SPECIALTY CHEMICALS
2011年
8期
16-20
,共5页
聚乙二醇单甲醚甲基丙烯酸酯%酯化反应%催化剂
聚乙二醇單甲醚甲基丙烯痠酯%酯化反應%催化劑
취을이순단갑미갑기병희산지%지화반응%최화제
polyethylene methyl ether methacrylate%esterification%catalyst
以甲基丙烯酸(MAA)和聚乙二醇单甲醚(MPEG)为主要原料,通过酯化反应制备聚乙二醇单甲醚甲基丙烯酸酯(1330)。研究了催化剂及其用量,阻聚剂用量,n(MAA):n(MPEG),酯化反应时间和酯化温度对酯化反应的影响,得到了最佳酯化条件:n(MAA):n(MPEG)=1.6:1,负载磺酸型催化剂用量2.5%,阻聚剂用量250×10~(-6),酯化温度11 5~120℃,反应回流5.5h。结果表明,在该条件下合成的聚乙二醇单甲醚甲基丙烯酸酯酯化率较高,在97.5%以上。
以甲基丙烯痠(MAA)和聚乙二醇單甲醚(MPEG)為主要原料,通過酯化反應製備聚乙二醇單甲醚甲基丙烯痠酯(1330)。研究瞭催化劑及其用量,阻聚劑用量,n(MAA):n(MPEG),酯化反應時間和酯化溫度對酯化反應的影響,得到瞭最佳酯化條件:n(MAA):n(MPEG)=1.6:1,負載磺痠型催化劑用量2.5%,阻聚劑用量250×10~(-6),酯化溫度11 5~120℃,反應迴流5.5h。結果錶明,在該條件下閤成的聚乙二醇單甲醚甲基丙烯痠酯酯化率較高,在97.5%以上。
이갑기병희산(MAA)화취을이순단갑미(MPEG)위주요원료,통과지화반응제비취을이순단갑미갑기병희산지(1330)。연구료최화제급기용량,조취제용량,n(MAA):n(MPEG),지화반응시간화지화온도대지화반응적영향,득도료최가지화조건:n(MAA):n(MPEG)=1.6:1,부재광산형최화제용량2.5%,조취제용량250×10~(-6),지화온도11 5~120℃,반응회류5.5h。결과표명,재해조건하합성적취을이순단갑미갑기병희산지지화솔교고,재97.5%이상。
Polyethylene methyl ether methacrylate(1300) was prepared by esterification of methacrylic acid (MAA) and methoxy polyethylene glycol(MPEG).The effect of n(MAA):n(MPEG),amount of catalyst and inhibitor,esterification temperature and time on esterification were investigated with the esterification rate as measurement index.The result shows that the optimal condition of esterification includes:the amount of catalyst is 2.5%according to the mass of MAA and MPEG,the amount of inhibitor is 250×10~(-6),n(MAA):n(MPEG) is 1.6:1,the esterification temperature is 115~120℃and the esterification time is 5.5h.The esterification rate was above 97.5%in this condition.